Finding the area between curves

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    Area Curves

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FARADAY JR
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Homework Statement



find the area bounded by:
y=X^2-2x
y=X+4

Homework Equations



HERE'S A LINK TO THE PROBLE:
http://picasaweb.google.com/luaykhouri/UntitledAlbum#

<embed type="application/x-shockwave-flash" src="http://picasaweb.google.com/s/c/bin/slideshow.swf" width="288" height="192" flashvars="host=picasaweb.google.com&hl=en_US&feat=flashalbum&RGB=0x000000&feed=http%3A%2F%2Fpicasaweb.google.com%2Fdata%2Ffeed%2Fapi%2Fuser%2Fluaykhouri%2Falbumid%2F5564384832648047857%3Falt%3Drss%26kind%3Dphoto%26hl%3Den_US" pluginspage="http://www.macromedia.com/go/getflashplayer"></embed>

The Attempt at a Solution


I tried solving the problem more than once, but i keep getting a wrong answer.
my teacher said the answer should be 125/6 and I keep getting 99/6, so can you please check my work and tell me what I did wrong. thank you.
[PLAIN]http://picasaweb.google.com/luaykhouri/UntitledAlbum#

Homework Statement


Homework Equations


The Attempt at a Solution


Homework Statement


Homework Equations


The Attempt at a Solution

 
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At the very end, it should be
\frac{112}{6} - \left( -\frac{13}{6} \right)
not
\frac{112}{6} - \frac{13}{6}
 
oh good eyes. thank you so much for pointing that out for me. thank you
 
There are two things I don't understand about this problem. First, when finding the nth root of a number, there should in theory be n solutions. However, the formula produces n+1 roots. Here is how. The first root is simply ##\left(r\right)^{\left(\frac{1}{n}\right)}##. Then you multiply this first root by n additional expressions given by the formula, as you go through k=0,1,...n-1. So you end up with n+1 roots, which cannot be correct. Let me illustrate what I mean. For this...

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